<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">

    <!-- 引入react核心库 -->
    <script src="https://unpkg.com/react@17/umd/react.development.js"></script>
    <!-- 引入react-dom，用于支持react操作DOM -->
    <script src="https://unpkg.com/react-dom@17/umd/react-dom.development.js"></script>
    <!-- 引入babel，用于将jsx转为js -->
    <script src="https://unpkg.com/@babel/standalone/babel.min.js"></script>
    <title>05-展示天气信息案例-精简版</title>
</head>

<body>
    <!-- 准备好一个"容器" -->
    <div id="root"></div>
    <script type="text/babel">
        // 1.创建组件
        class Weather extends React.Component {
            // 初始化状态
            state = { isHot: false, wind: '微风' }

            render() {
                const { isHot, wind } = this.state
                return <h1 onClick={this.changeWeather}>今天天气很{isHot ? '炎热' : '凉爽'}，{wind}</h1>
            }

            // 自定义方法————要用赋值语句的形式+箭头函数
            // 没有放在原型上，而是放在实例上
            changeWeather = () => {
                const isHot = this.state.isHot
                this.setState({ isHot: !isHot })
            }
        }
        // 2.渲染组件到页面
        ReactDOM.render(<Weather />, document.getElementById('root'))

    </script>
</body>

</html>